Product available Ships today (order by 14:00)

MW 70x40 / N38 - cylindrical magnet

Name: Dhit sp. z o.o.
Address: Kościuszki 6A, Ożarów Mazowiecki, mazowieckie, 05-850, PL
Telephone: +48 22 499 98 98
Price range: 1-6500 PLN

cylindrical magnet

Catalog no 010097

GTIN/EAN: 5906301810964

5.00

Load capacity 164.24 kg / 1611.16 N Magnetic Induction 466.52 mT / 4665 Gs

Diameter Ø: 70 mm [±0,1 mm]
Height: 40 mm [±0,1 mm]
Weight: 1154.54 g
Magnetization Direction: ↑ axial
Coating: [NiCuNi] Nickel

How we measure these parameters — certificates and measurements

product specifications »

321.46 zł net / pcs

395.40 zł with VAT (23% VAT) / pcs

price for transport

bulk discounts:

Need more?

Quantity

Net

Gross

price from 1 pcs

321.46 zł

395.40 zł

price from 5 pcs

302.17 zł

371.67 zł

price from 10 pcs

282.88 zł

347.95 zł

Frequently asked questions

What is the maximum working temperature of a disc magnet?

Standard N-series grades work up to 80 °C. Grades N50, N52 and N54 have a lower limit of 60 °C, because coercivity falls as BHmax rises. Higher temperatures require the H (120 °C), SH (150 °C), UH (180 °C), EH (200 °C) or AH (230 °C) series. Within the working range the magnet loses about 0.11% of its induction per degree, and that loss is reversible.

What is the difference between N38, N42 and N52?

The number after N is the energy product BHmax. Moving from N38 to N52 raises it by several tens of percent, but the real holding force increases by roughly 20%, because force also depends on geometry and on the magnetic circuit. N52 costs about twice as much as N42, so for most mounting work N38–N42 is the best price-to-force ratio.

What is the dimensional tolerance?

±0.1 mm as standard, ±0.05 mm to order. The tolerance is stated next to the dimensions on every product page.

Guides from the knowledge base

Engineering report for this magnet

Full PDF analysis: pull and shear force, effect of distance, temperature and plate thickness, safety distances and the demagnetization curve.

PDF report Calculator

Want to talk magnets?

Call us now +48 888 99 98 98 alternatively let us know using contact form the contact section.
Specifications and structure of a neodymium magnet can be estimated using our power calculator.

Order by 14:00 and we’ll ship today!

Detailed specification - MW 70x40 / N38 - cylindrical magnet

Specification / characteristics - MW 70x40 / N38 - cylindrical magnet

properties

properties	values
Cat. no.	010097
GTIN/EAN	5906301810964
Production/Distribution	Dhit sp. z o.o. ul. Zielona 14 05-850 Ożarów Mazowiecki PL
Country of origin	Poland / China / Germany
Customs code	85059029
Diameter Ø	70 mm [±0,1 mm]
Height	40 mm [±0,1 mm]
Weight	1154.54 g
Magnetization Direction	↑ axial
Load capacity ~ ?	164.24 kg / 1611.16 N
Magnetic Induction ~ ?	466.52 mT / 4665 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 70x40 / N38 - cylindrical magnet

properties	values	units
Remanence Br ?	12.2-12.6	kGs
Remanence Br ?	1220-1260	mT
Coercivity bHc ?	10.8-11.5	kOe
Coercivity bHc ?	860-915	kA/m
Intrinsic coercivity iHc	≥ 12	kOe
Intrinsic coercivity iHc	≥ 955	kA/m
Energy product BHmax ?	36-38	BH max MGOe
Energy product BHmax ?	287-303	BH max KJ/m
Maximum working temperature ?	≤ 80	°C

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

properties	values	units
Vickers hardness	≥550	Hv
Density	≥7.4	g/cm³
Curie Temperature TC	310	°C
Curie Temperature TF	590	°F
Specific resistance	150	μΩ⋅cm
Bending strength	250	MPa
Compressive strength	1000~1100	MPa
Thermal expansion parallel (∥) to orientation (M)	(3-4) x 10^-6	°C^-1
Thermal expansion perpendicular (⊥) to orientation (M)	-(1-3) x 10^-6	°C^-1
Young's modulus	1.7 x 10⁴	kg/mm²

Engineering analysis of the assembly - data

These information represent the outcome of a physical calculation. Results are based on algorithms for the class Nd₂Fe₁₄B. Real-world performance might slightly deviate from the simulation results. Treat these calculations as a supplementary guide when designing systems.

Table 1: Static force (pull vs distance) - characteristics
MW 70x40 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	4665 Gs 466.5 mT	164.24 kg / 362.09 pounds 164240.0 g / 1611.2 N	dangerous!
1 mm	4538 Gs 453.8 mT	155.47 kg / 342.75 pounds 155467.9 g / 1525.1 N	dangerous!
2 mm	4409 Gs 440.9 mT	146.74 kg / 323.52 pounds 146744.5 g / 1439.6 N	dangerous!
3 mm	4279 Gs 427.9 mT	138.20 kg / 304.68 pounds 138201.8 g / 1355.8 N	dangerous!
5 mm	4017 Gs 401.7 mT	121.81 kg / 268.54 pounds 121806.5 g / 1194.9 N	dangerous!
10 mm	3376 Gs 337.6 mT	86.03 kg / 189.65 pounds 86025.3 g / 843.9 N	dangerous!
15 mm	2788 Gs 278.8 mT	58.69 kg / 129.38 pounds 58686.8 g / 575.7 N	dangerous!
20 mm	2279 Gs 227.9 mT	39.22 kg / 86.46 pounds 39215.6 g / 384.7 N	dangerous!
30 mm	1511 Gs 151.1 mT	17.22 kg / 37.97 pounds 17222.5 g / 169.0 N	dangerous!
50 mm	699 Gs 69.9 mT	3.69 kg / 8.13 pounds 3690.0 g / 36.2 N	strong

Pulling power weakens sharply with every subsequent millimeter of gap. Note that even a microscopic distance (e.g., contamination, varnish, dust) significantly reduces the pull force. Neodymiums operate optimally at the point of direct contact; air break kills the force. See how flashily the pull force plummet, when the product does not touch flatly to the steel surface. When calculating the mounting, avoid unnecessary gaps.

Table 2: Sliding capacity (vertical surface)
MW 70x40 / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	32.85 kg / 72.42 pounds 32848.0 g / 322.2 N
1 mm	Stal (~0.2)	31.09 kg / 68.55 pounds 31094.0 g / 305.0 N
2 mm	Stal (~0.2)	29.35 kg / 64.70 pounds 29348.0 g / 287.9 N
3 mm	Stal (~0.2)	27.64 kg / 60.94 pounds 27640.0 g / 271.1 N
5 mm	Stal (~0.2)	24.36 kg / 53.71 pounds 24362.0 g / 239.0 N
10 mm	Stal (~0.2)	17.21 kg / 37.93 pounds 17206.0 g / 168.8 N
15 mm	Stal (~0.2)	11.74 kg / 25.88 pounds 11738.0 g / 115.1 N
20 mm	Stal (~0.2)	7.84 kg / 17.29 pounds 7844.0 g / 76.9 N
30 mm	Stal (~0.2)	3.44 kg / 7.59 pounds 3444.0 g / 33.8 N
50 mm	Stal (~0.2)	0.74 kg / 1.63 pounds 738.0 g / 7.2 N

This section indicates the approximate shear load needed to cause the downward movement of the magnet downwards along a vertical metal surface (considering typical friction). This value is a function of the distance between the magnet and the surface.

Table 3: Vertical assembly (sliding) - vertical pull
MW 70x40 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	49.27 kg / 108.63 pounds 49272.0 g / 483.4 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	32.85 kg / 72.42 pounds 32848.0 g / 322.2 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	16.42 kg / 36.21 pounds 16424.0 g / 161.1 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	82.12 kg / 181.04 pounds 82120.0 g / 805.6 N

When placing a magnet on a vertical plane (e.g., a fridge), it will maintain barely about 1/5 of nominal attraction strength. Gravitational force and a low friction coefficient influence the fact that holders slip faster than they detach. Planning a hanger? Consider that the sliding force is much weaker than the perpendicular breakaway force. On a smooth steel, the magnet will give way down under a significantly smaller weight. Utilizing a rubberized pad can drastically improve the result.

Table 4: Steel thickness (saturation) - power losses
MW 70x40 / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	3%	5.47 kg / 12.07 pounds 5474.7 g / 53.7 N
1 mm	8%	13.69 kg / 30.17 pounds 13686.7 g / 134.3 N
2 mm	17%	27.37 kg / 60.35 pounds 27373.3 g / 268.5 N
3 mm	25%	41.06 kg / 90.52 pounds 41060.0 g / 402.8 N
5 mm	42%	68.43 kg / 150.87 pounds 68433.3 g / 671.3 N
10 mm	83%	136.87 kg / 301.74 pounds 136866.7 g / 1342.7 N
11 mm	92%	150.55 kg / 331.91 pounds 150553.3 g / 1476.9 N
12 mm	100%	164.24 kg / 362.09 pounds 164240.0 g / 1611.2 N

A too thin steel is incapable of absorb the entire magnetic field, which weakens actual performance of the holder. If you install a neodymium to a thin surface, the flux will penetrate right through and the holding will be smaller. To achieve the maximum of this neodymium's potential, you require a sufficiently solid element of metal. The saturation phenomenon causes that on sheet metal structures (e.g., thin profiles), the holder works worse. We advise picking the steel dimension based on the following data.

Table 5: Thermal resistance (stability) - thermal limit
MW 70x40 / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	164.24 kg / 362.09 pounds 164240.0 g / 1611.2 N	OK
40 °C	-2.2%	160.63 kg / 354.12 pounds 160626.7 g / 1575.7 N	OK
60 °C	-4.4%	157.01 kg / 346.15 pounds 157013.4 g / 1540.3 N	OK
80 °C	-6.6%	153.40 kg / 338.19 pounds 153400.2 g / 1504.9 N
100 °C	-28.8%	116.94 kg / 257.81 pounds 116938.9 g / 1147.2 N

Classic neodymiums irreversibly lose parameters past the thermal threshold. Avoid high temperatures – high temperature can permanently demagnetize this product. As the temperature rises, the magnet's force briefly decreases. Do not use this product near heat sources higher than its working range. Too high temperature will lead to destruction of magnetic properties.

*Important note: Thermal stability is determined by both grade, as well as the dimension ratios. Thin magnets (pancake types) may lose charge permanently under lower heat stress than long magnets. The danger warning in the table points to permanent field degradation for this specific geometry.

Table 6: Magnet-Magnet interaction (repulsion) - field range
MW 70x40 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Lateral Force (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	516.26 kg / 1138.16 pounds 5 679 Gs	77.44 kg / 170.72 pounds 77439 g / 759.7 N	N/A
1 mm	502.57 kg / 1107.98 pounds 9 205 Gs	75.39 kg / 166.20 pounds 75385 g / 739.5 N	452.31 kg / 997.18 pounds ~0 Gs
2 mm	488.69 kg / 1077.37 pounds 9 077 Gs	73.30 kg / 161.61 pounds 73303 g / 719.1 N	439.82 kg / 969.63 pounds ~0 Gs
3 mm	474.91 kg / 1047.01 pounds 8 948 Gs	71.24 kg / 157.05 pounds 71237 g / 698.8 N	427.42 kg / 942.31 pounds ~0 Gs
5 mm	447.76 kg / 987.15 pounds 8 688 Gs	67.16 kg / 148.07 pounds 67164 g / 658.9 N	402.99 kg / 888.43 pounds ~0 Gs
10 mm	382.88 kg / 844.10 pounds 8 034 Gs	57.43 kg / 126.62 pounds 57432 g / 563.4 N	344.59 kg / 759.69 pounds ~0 Gs
20 mm	270.41 kg / 596.14 pounds 6 752 Gs	40.56 kg / 89.42 pounds 40561 g / 397.9 N	243.37 kg / 536.53 pounds ~0 Gs
50 mm	81.66 kg / 180.03 pounds 3 710 Gs	12.25 kg / 27.01 pounds 12249 g / 120.2 N	73.50 kg / 162.03 pounds ~0 Gs
60 mm	54.14 kg / 119.35 pounds 3 021 Gs	8.12 kg / 17.90 pounds 8120 g / 79.7 N	48.72 kg / 107.41 pounds ~0 Gs
70 mm	36.14 kg / 79.69 pounds 2 469 Gs	5.42 kg / 11.95 pounds 5422 g / 53.2 N	32.53 kg / 71.72 pounds ~0 Gs
80 mm	24.40 kg / 53.80 pounds 2 028 Gs	3.66 kg / 8.07 pounds 3661 g / 35.9 N	21.96 kg / 48.42 pounds ~0 Gs
90 mm	16.70 kg / 36.82 pounds 1 678 Gs	2.51 kg / 5.52 pounds 2505 g / 24.6 N	15.03 kg / 33.14 pounds ~0 Gs
100 mm	11.60 kg / 25.57 pounds 1 398 Gs	1.74 kg / 3.84 pounds 1740 g / 17.1 N	10.44 kg / 23.01 pounds ~0 Gs

Two strong neodymiums interact from a wider radius than a magnet and sheet setup. Such a system of magnet-to-magnet generates a stronger field and a further horizon of action. Want to build a strong closure? Utilize two neodymiums instead of one magnet and a striker plate. Remember that when bringing together two magnets, the collision energy is massive. The repulsion force is slightly lower than the connection force, but still significant.
*The magnetic induction for N-N configuration is approximately ~0 Gs in the exact middle between the magnets (caused by magnetic field nullification).
Attention: Figures apply to sliding force of two matching magnets (friction coefficient ~0.15 for Ni-Ni coating).

Table 7: Protective zones (electronics) - warnings
MW 70x40 / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	37.5 cm
Hearing aid	10 Gs (1.0 mT)	29.5 cm
Timepiece	20 Gs (2.0 mT)	23.0 cm
Mobile device	40 Gs (4.0 mT)	17.5 cm
Car key	50 Gs (5.0 mT)	16.5 cm
Payment card	400 Gs (40.0 mT)	7.0 cm
HDD hard drive	600 Gs (60.0 mT)	5.5 cm

Extremely neodym field poses a serious hazard to electronics and pacemakers. These neodymiums generate a field that prevents correct functioning of digital equipment. Remember: the unseen radiation penetrates the body and glass. Special caution must be taken by people with cochlear implants and insulin pumps. Also at risk are: mechanical watches, car keys, speakers, and screens. Avoid contact with magnetic cards, hard drives, or sensitive navigation tools.

Table 8: Dynamics (kinetic energy) - warning
MW 70x40 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	16.46 km/h (4.57 m/s)	12.06 J
30 mm	21.49 km/h (5.97 m/s)	20.57 J
50 mm	22.36 km/h (6.21 m/s)	22.26 J
100 mm	22.63 km/h (6.28 m/s)	22.80 J

Neodymium magnets are very brittle – a violent impact against metal can result in shattering. Watch the impact speed – a magnet released freely speeds with massive force. Impact energy can trigger coating fragments or injury to skin. Be sure to control the product during mounting so it doesn't hit violently against the metal. A collision at high speed almost guarantees destruction of the magnet. Wear safety glasses when handling with large magnets.

Table 9: Coating parameters (durability)
MW 70x40 / N38

Technical parameter	Value / Description
Coating type	[NiCuNi] Nickel
Layer structure	Nickel - Copper - Nickel
Layer thickness	10-20 µm
Salt spray test (SST) ?	24 h
Recommended environment	Indoors only (dry)

For outdoor applications, an epoxy coating is required; standard nickel is intended for indoor use. Moisture resistance is crucial for installations in bathrooms or outdoors.

Table 10: Construction data (P_c)
MW 70x40 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	180 982 Mx	1809.8 µWb
P_c Coefficient	0.64	High (Stable)

Flux value emitted by the magnet pole. Essential parameter in coil applications and motors. The P_c coefficient defines the magnet's operating point.

Table 11: Underwater work (magnet fishing)
MW 70x40 / N38

Environment	Effective steel pull	Effect
Air (land)	164.24 kg	Standard
Water (riverbed)	188.05 kg (+23.81 kg buoyancy gain)	+14.5%

Corrosion warning: This magnet has a standard nickel coating. After use in water, it must be dried and maintained immediately, otherwise it will rust!

In water, the magnet feels stronger thanks to Archimedes' principle. As a result, your magnet will pull a heavier object from the bottom than if you lifted it in the air.

1. Wall mount (shear)

*Note: On a vertical wall, the magnet holds only a fraction of its nominal pull.

2. Efficiency vs thickness

*Thin steel (e.g. 0.5mm PC case) drastically weakens the holding force.

3. Heat tolerance

*For standard magnets, the max working temp is 80°C.

4. Demagnetization curve and operating point (B-H)

chart generated for the permeance coefficient P_c (Permeance Coefficient) = 0.64

This simulation demonstrates the magnetic stability of the selected magnet under specific geometric conditions. The solid red line represents the demagnetization curve (material potential), while the dashed blue line is the load line based on the magnet's geometry. The P_c (Permeance Coefficient), also known as the load line slope, is a dimensionless value that describes the relationship between the magnet's shape and its magnetic stability. The intersection of these two lines (the black dot) is the operating point — it determines the actual magnetic flux density generated by the magnet in this specific configuration. A higher P_c value means the magnet is more 'slender' (tall relative to its area), resulting in a higher operating point and better resistance to irreversible demagnetization caused by external fields or temperature. A value of 0.42 is relatively low (typical for flat magnets), meaning the operating point is closer to the 'knee' of the curve — caution is advised when operating at temperatures near the maximum limit to avoid strength loss.

Technical specification and ecology

Material specification

iron (Fe)	64% – 68%
neodymium (Nd)	29% – 32%
boron (B)	1.1% – 1.2%
dysprosium (Dy)	0.5% – 2.0%
coating (Ni-Cu-Ni)	< 0.05%

Sustainability

recyclability (EoL)	100%
recycled raw materials	~10% (pre-cons)
carbon footprint	low / zredukowany
waste code (EWC)	16 02 16

Safety card (GPSR)

responsible entity

Dhit sp. z o.o.

ul. Kościuszki 6A, 05-850 Ożarów Mazowiecki

tel: +48 22 499 98 98 | e-mail: bok@dhit.pl

batch number/type

id: 010097-2026

Magnet Unit Converter

Force (pull)

Newtons (N)

Force in lbs

Field Strength

Induction (Gs)

Induction (T)

Just complete a single box, to let the tool fill in everything else for you.

Other products

Product available Ships today (order by 14:00)

MW 8x20 / N38 - cylindrical magnet

4.60 zł brutto / pcs

Product available Ships today (order by 14:00)

MPL 35x35x10 / N38 - lamellar magnet

35.10 zł brutto / pcs

Product available Ships today (order by 14:00)

MW 40x8 / N38 - cylindrical magnet

31.27 zł brutto / pcs

Product available Ships today (order by 14:00)

SM 28x400 [2xM8] / N52 - magnetic separator

1242.30 zł brutto / pcs

The offered product is an extremely powerful cylindrical magnet, composed of modern NdFeB material, which, at dimensions of Ø70x40 mm, guarantees maximum efficiency. The MW 70x40 / N38 model boasts high dimensional repeatability and industrial build quality, making it an ideal solution for professional engineers and designers. As a magnetic rod with significant force (approx. 164.24 kg), this product is in stock from our European logistics center, ensuring quick order fulfillment. Furthermore, its triple-layer Ni-Cu-Ni coating shields it against corrosion in typical operating conditions, ensuring an aesthetic appearance and durability for years.

It finds application in DIY projects, advanced robotics, and broadly understood industry, serving as a positioning or actuating element. Thanks to the high power of 1611.16 N with a weight of only 1154.54 g, this cylindrical magnet is indispensable in electronics and wherever low weight is crucial.

Since our magnets have a very precise dimensions, the best method is to glue them into holes with a slightly larger diameter (e.g., 70.1 mm) using two-component epoxy glues. To ensure long-term durability in automation, anaerobic resins are used, which do not react with the nickel coating and fill the gap, guaranteeing high repeatability of the connection.

Grade N38 is the most frequently chosen standard for industrial neodymium magnets, offering an optimal price-to-power ratio and high resistance to demagnetization. If you need even stronger magnets in the same volume (Ø70x40), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard in continuous sale in our store.

This model is characterized by dimensions Ø70x40 mm, which, at a weight of 1154.54 g, makes it an element with high magnetic energy density. The key parameter here is the holding force amounting to approximately 164.24 kg (force ~1611.16 N), which, with such compact dimensions, proves the high grade of the NdFeB material. The product has a [NiCuNi] coating, which protects the surface against oxidation, giving it an aesthetic, silvery shine.

This cylinder is magnetized axially (along the height of 40 mm), which means that the N and S poles are located on the flat, circular surfaces. Such an arrangement is standard when connecting magnets in stacks (e.g., in filters) or when mounting in sockets at the bottom of a hole. On request, we can also produce versions magnetized through the diameter if your project requires it.

Pros and cons of Nd₂Fe₁₄B magnets.

Pros

Besides their immense field intensity, neodymium magnets offer the following advantages:

They virtually do not lose power, because even after ten years the decline in efficiency is only ~1% (based on calculations),
Magnets perfectly defend themselves against demagnetization caused by foreign field sources,
A magnet with a smooth gold surface has better aesthetics,
Magnetic induction on the surface of the magnet remains very high,
Thanks to resistance to high temperature, they are capable of working (depending on the shape) even at temperatures up to 230°C and higher...
Possibility of accurate forming as well as adapting to concrete requirements,
Universal use in modern industrial fields – they are used in magnetic memories, electric drive systems, precision medical tools, as well as multitasking production systems.
Compactness – despite small sizes they provide effective action, making them ideal for precision applications

Cons

Disadvantages of NdFeB magnets:

They are fragile upon heavy impacts. To avoid cracks, it is worth securing magnets in a protective case. Such protection not only protects the magnet but also improves its resistance to damage
Neodymium magnets decrease their force under the influence of heating. As soon as 80°C is exceeded, many of them start losing their force. Therefore, we recommend our special magnets marked [AH], which maintain durability even at temperatures up to 230°C
They oxidize in a humid environment - during use outdoors we suggest using waterproof magnets e.g. in rubber, plastic
We recommend cover - magnetic holder, due to difficulties in realizing threads inside the magnet and complex shapes.
Health risk related to microscopic parts of magnets pose a threat, in case of ingestion, which gains importance in the context of child safety. Additionally, tiny parts of these products can disrupt the diagnostic process medical in case of swallowing.
Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications

Holding force characteristics

Magnetic strength at its maximum – what contributes to it?

The load parameter shown concerns the limit force, obtained under optimal environment, meaning:

with the application of a sheet made of special test steel, ensuring full magnetic saturation
with a cross-section no less than 10 mm
characterized by lack of roughness
without the slightest clearance between the magnet and steel
during pulling in a direction perpendicular to the mounting surface
at ambient temperature approx. 20 degrees Celsius

Key elements affecting lifting force

Effective lifting capacity is affected by specific conditions, such as (from priority):

Gap between surfaces – every millimeter of distance (caused e.g. by veneer or unevenness) drastically reduces the pulling force, often by half at just 0.5 mm.
Pull-off angle – remember that the magnet holds strongest perpendicularly. Under sliding down, the capacity drops significantly, often to levels of 20-30% of the maximum value.
Plate thickness – too thin sheet causes magnetic saturation, causing part of the flux to be wasted to the other side.
Material type – ideal substrate is pure iron steel. Cast iron may attract less.
Plate texture – smooth surfaces guarantee perfect abutment, which improves force. Rough surfaces reduce efficiency.
Thermal environment – heating the magnet results in weakening of force. It is worth remembering the thermal limit for a given model.

Lifting capacity testing was carried out on plates with a smooth surface of suitable thickness, under perpendicular forces, whereas under shearing force the lifting capacity is smaller. In addition, even a slight gap between the magnet and the plate reduces the load capacity.

H&S for magnets

Fire risk

Combustion risk: Neodymium dust is highly flammable. Avoid machining magnets without safety gear as this risks ignition.

Crushing risk

Big blocks can break fingers instantly. Never put your hand betwixt two strong magnets.

Warning for heart patients

Health Alert: Strong magnets can deactivate heart devices and defibrillators. Stay away if you have electronic implants.

GPS Danger

A strong magnetic field interferes with the functioning of compasses in phones and GPS navigation. Maintain magnets near a device to prevent breaking the sensors.

Adults only

Strictly keep magnets away from children. Risk of swallowing is high, and the effects of magnets connecting inside the body are tragic.

Magnet fragility

Neodymium magnets are ceramic materials, which means they are very brittle. Impact of two magnets will cause them breaking into shards.

Allergic reactions

Nickel alert: The nickel-copper-nickel coating consists of nickel. If an allergic reaction occurs, immediately stop working with magnets and use protective gear.

Demagnetization risk

Avoid heat. NdFeB magnets are sensitive to temperature. If you need operation above 80°C, ask us about special high-temperature series (H, SH, UH).

Handling rules

Before use, read the rules. Sudden snapping can break the magnet or injure your hand. Think ahead.

Protect data

Data protection: Strong magnets can ruin payment cards and delicate electronics (pacemakers, medical aids, mechanical watches).

Attention! Need more info? Check our post: Why are neodymium magnets dangerous?

MW 70x40 / N38 - cylindrical magnet

Detailed specification - MW 70x40 / N38 - cylindrical magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Engineering analysis of the assembly - data

Table 1: Static force (pull vs distance) - characteristics MW 70x40 / N38

Table 2: Sliding capacity (vertical surface) MW 70x40 / N38

Table 3: Vertical assembly (sliding) - vertical pull MW 70x40 / N38

Table 4: Steel thickness (saturation) - power losses MW 70x40 / N38

Table 5: Thermal resistance (stability) - thermal limit MW 70x40 / N38

Table 6: Magnet-Magnet interaction (repulsion) - field range MW 70x40 / N38

Table 7: Protective zones (electronics) - warnings MW 70x40 / N38

Table 8: Dynamics (kinetic energy) - warning MW 70x40 / N38

Table 9: Coating parameters (durability) MW 70x40 / N38

Table 10: Construction data (Pc) MW 70x40 / N38

Table 11: Underwater work (magnet fishing) MW 70x40 / N38

1. Wall mount (shear)

2. Efficiency vs thickness

3. Heat tolerance

4. Demagnetization curve and operating point (B-H)

Material specification

Sustainability

Force (pull)

Field Strength

Other products

MW 8x20 / N38 - cylindrical magnet

MPL 35x35x10 / N38 - lamellar magnet

MW 40x8 / N38 - cylindrical magnet

SM 28x400 [2xM8] / N52 - magnetic separator

Pros and cons of Nd2Fe14B magnets.

Pros

Cons

Holding force characteristics

Magnetic strength at its maximum – what contributes to it?

Key elements affecting lifting force

H&S for magnets

Fire risk

Crushing risk

Warning for heart patients

GPS Danger

Adults only

Magnet fragility

Allergic reactions

Demagnetization risk

Handling rules

Protect data

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static force (pull vs distance) - characteristics
MW 70x40 / N38

Table 2: Sliding capacity (vertical surface)
MW 70x40 / N38

Table 3: Vertical assembly (sliding) - vertical pull
MW 70x40 / N38

Table 4: Steel thickness (saturation) - power losses
MW 70x40 / N38

Table 5: Thermal resistance (stability) - thermal limit
MW 70x40 / N38

Table 6: Magnet-Magnet interaction (repulsion) - field range
MW 70x40 / N38

Table 7: Protective zones (electronics) - warnings
MW 70x40 / N38

Table 8: Dynamics (kinetic energy) - warning
MW 70x40 / N38

Table 9: Coating parameters (durability)
MW 70x40 / N38

Table 10: Construction data (P_c)
MW 70x40 / N38

Table 11: Underwater work (magnet fishing)
MW 70x40 / N38

Pros and cons of Nd₂Fe₁₄B magnets.